TEXAS INSTRUMENTS PT6400 Technical data
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PT6400 Series
3 Amp 5V Input Adjustable
Integrated Switching Regulator
Standard Application
V
COM
2,3,4
IN
C1
100µF
C1 = Required 100µF electrolytic
C
PT6400
5,6,7,8
+
= Required 100µF electrolytic
2
9,10,11
(VOUP)
12
(VODOWN)
SLTS032A
(Revised 6/30/2000)
• Single-Device 5V to 3V Power
• 85% Efficiency
• Small SIP Footprint
• Adjustable Output Voltage
The PT6400 is a high performance
+5V to +3.3V, 3 Amp, 12-Pin SIP
(Single In-line Package) Integrated
Switching Regulator (ISR) designed
for stand alone (not parallelable) operation. This high-performance ISR
Pin-Out Information
Pin Function
1 Do not connect
2V
in
3V
in
4V
V
100µF
OUT
+
C2
COM
R1
R2
5 GND
6 GND
7 GND
8 GND
9V
10 V
11 V
12 V
in
out
out
out
out
Adjust
Ordering Information
PT6404 = +1.5 Volts
PT6405 = +3.3 Volts
PT6406 = +1.8 Volts
PT6407 = +2.1 Volts
PT6408 = +1.2 Volts
PT6409 = +2.5 Volts
Pkg Style 300
allows easy integration of low-power
3.3V logic IC’s into existing 5V systems
without redesigning the central power
supply. Only two external capacitors are
required for proper operation. The output voltage is easily adjustable with one
external resistor. The PT6406,7,8 can
be used to terminate high-speed data
buses such as Futurebus (+2.1V) or the
new GTL (+1.2V) logic buses.
Please note that this product does
not include short circuit protection.
PT Series Suffix
Case/Pin
Configuration
Vertical Through-Hole
Horizontal Through-Hole
Horizontal Surface Mount
PT6400
Note: Back surface
of product is
conducting metal.
(PT1234X)
P
D
E
Specifications
Characteristics
(Ta = 25°C unless noted) Symbols Conditions Min Typ Max Units
Output Current I
Current Limit I
Input Voltage Range V
Output Voltage Tolerance ∆V
Line Regulation Reg
Load Regulation Reg
Vo Ripple/Noise V
Transient Response t
with C2 = 100µF V
o
cl
in
o
line
load
n
tr
os
Efficiency η V
Switching Frequency ƒ
Absolute Maximum T
Operating Temperature Range
Recommended Operating T
Temperature Range At Vin= 5V, Io=2.5A
Thermal Resistance θ
Storage Temperature T
o
a
a
ja
s
Mechanical Shock Per Mil-STD-883D, Method 2002.3 , 1 msec,
Mechanical Vibration Per Mil-STD-883D, Method 2007.2,
4.5V ≤ V
V
0.1A ≤ I
V
0°C ≤ Ta ≤ +70°C
4.5V ≤ V
V
V
Io step between 1.5A and 3.0A — 200 — µSec
Vo over/undershoot — 200 — mV
4.5V ≤ V
0.3A ≤ I
≤ 5.5V 0.1* — 3.0 A
in
= +5V — 3.6 5.0 A
in
≤ 3.0A 4.5 — 5.5 V
o
= +5V, Io = 3.0A
in
≤ 5.5V, I
in
= +5V, 0.3 ≤ I
in
= 5V, Io = 3.0A — 66 165 mV
in
= +5V, Io = 1.5A Vo= 3.3V — 85 — %
in
in
≤ 3.0A
o
= 3.0A — ±10 ±25 mV
o
≤ 3.0A — ±10 ±25 mV
o
o= 1.8V — 74 — %
V
V
o= 2.1V — 77 — %
Vo= 1.2V — 63 — %
≤ 5.5V
Free Air Convection (40-60 LFM)
Free Air Convection (40-60 LFM) — 25 — °C/W
— -40 — +125 °C
Half Sine, mounted to a fixture
20-2000 Hz, Soldered in a PC board
Weight — — — 6.5 — grams
*ISR will operate down to no load with reduced specifications
**See Thermal Derating chart.
Note:
The PT6400 Series requires two 100µF electrolytic or tantalum capacitors for proper operation in all applications.
PT6400 SERIES
V
o-0.05 — Vo+0.05 V
500 650 800 kHz
0—+85°C
0 — + 70** °C
—500—G’s
— 15 — G’s
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
PT6400 Series
Typical Characteristics
3 Amp 5V Input Adjustable
Integrated Switching Regulator
PT6408, 1.2 VDC (See Note 1) PT6407, 2.1 VDC (See Note 1) PT6405, 3.3 VDC (See Note 1)
100
90
80
70
60
Efficiency - %Ripple-(mV)Iout-(Amps)PD-(Watts)
50
40
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Iout-(Amps)
Ripple vs Output Current
100
80
60
40
20
0
0 0.5 1 1.5 2 2 .5 3
Iout-(Amps)
Thermal Derating (T
3
2.5
2
1.5
1
0.5
0
4.5 4.75 5 5.25 5.5
) (See Note 2) Thermal Derating (Ta) (See Note 2)
a
Vin-(Volts) Vin-(Volts)Vin-(Volts)
85°C
Efficiency vs Output CurrentEfficiency vs Output Current
100
Vin
4.5V
5.0V
5.5V
90
80
70
60
Efficiency - %
50
40
00.511.522.53
Iout-(Amps)
Vin
4.5V
5.0V
5.5V
Efficiency vs Output Current
100
90
80
70
60
Efficiency - %
50
40
00.511.522.53
Iout-(Amps)
Vin
4.5V
5.0V
5.5V
Ripple vs Output Current Ripple vs Output Current
100
80
Vin
5.5V
5.0V
4.5V
60
40
Ripple-(mV)
20
0
00.511.522.53
Vin
5.5V
5.0V
4.5V
Iout-(Amps)
3
2.5
2
1.5
Iout-(Amps)
1
0.5
0
4.5 4.75 5 5.25 5.5
85°C
100
80
60
40
Ripple-(mV)Iout-(Amps)
20
0
00.511.522.53
Iout-(Amps)
Thermal Derating (T
3
2.5
2
1.5
1
0.5
0
4.5 4.75 5 5.25 5.5
) (See Note 2)
a
Vin
5.5V
5.0V
4.5V
85°C
Power Dissipation vs Output Current Power Dissipation vs Output Current
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Vin
5.5V
5.0V
4.5V
2.5
2
1.5
1
PD-(Watts)
0.5
0
00.511.522.53
Vin
5.5V
5.0V
4.5V
Power Dissipation vs Output Current
2.5
2
1.5
1
PD-(Watts)
0.5
0
00.511.522.53
Iout-(Amps) Iout-(Amps) Iout-(Amps)
Note 1: All data listed in the above graphs, except for derating data, has been developed from actual products tested at 25°C. This data is considered typical data for the ISR.
Note 2: Thermal derating graphs are developed in free air convection cooling of 40-60 LFM. (See Thermal Application Notes.)
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Vin
5.5V
5.0V
4.5V
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